Create a program that plays a game of tic-tac-toe between a human and the computer in c++ Use a variable board[3][3] to store the board. Since the board is needed by all parts of the program, it can be a global variable. You will want to create the following functions: int score(int cell1,int cell2,int cell3) Using +1 for an X, 1 for an O and 0 for an empty cell, add the values for the three specified cells and return the sum. bool playerWins(char player) Returns true if the given player has won, false if they have not currently won (note: this doesnt necessarily mean that the player has lost.) bool canWin(char player,int &square) This function should look at the board and return true if the given player (X or O) can win on this move and return false if the player cannot win on this move. Fill in the appropriate square if the player can win on this move. Hint: Whats the difference between canWin(X,sq) and canBlock(O,sq)? void printBoard(void) Displays the current board (see above.) int getComputerMove(char player) Gets the computers move as either X or O according to the algorithm described above. int getHumanMove(char player) Gets the humans move as either X or O. Also validates the move to make sure its legal.